package com.zzyl.nursing.service.impl;

import cn.hutool.core.util.ObjectUtil;
import cn.hutool.http.HttpUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.core.toolkit.ObjectUtils;
import com.zzyl.nursing.service.WeChatService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
public class WeChatServiceImpl implements WeChatService {

    // 登录
    private static final String REQUEST_URL = "https://api.weixin.qq.com/sns/jscode2session?grant_type=authorization_code";

    // 获取token
    private static final String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential";

    // 获取手机号
    private static final String PHONE_REQUEST_URL = "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=";

    @Value("${wx.appid}")
    private String appid;

    @Value("${wx.secret}")
    private String secret;

    @Override
    public String getOpenId(String code) {
        Map<String, Object> params = new HashMap<>();
        params.put("appid", appid);
        params.put("secret", secret);
        params.put("js_code", code);
        String result = HttpUtil.get(REQUEST_URL, params);
        // 获取openId
        JSONObject entries = JSONUtil.parseObj(result);
        if (ObjectUtil.isNotEmpty(entries.getInt("errcode"))){
            throw new RuntimeException(entries.getStr("errmsg"));
        }
        return entries.getStr("openid");
    }

    /**
     * 获取微信手机号
     *
     * @param phoneCode 登录临时凭证
     * @return 手机号
     */
    @Override
    public String getPhone(String phoneCode) {
        Map<String, Object> params = new HashMap<>();
        params.put("code", phoneCode);
        String result = HttpUtil.post(PHONE_REQUEST_URL + getAccessToken(), JSONUtil.toJsonStr(params));
        JSONObject jsonObject = JSONUtil.parseObj(result);
        if(jsonObject.getInt("errcode")  != 0){
            throw new RuntimeException(jsonObject.getStr("errmsg"));
        }
        return jsonObject.getJSONObject("phone_info").getStr("phoneNumber");
    }

    /**
     * 获取微信access_token
     * @return
     */
    private String getAccessToken() {
        Map<String, Object> params = new HashMap<>();
        params.put("appid", appid);
        params.put("secret", secret);

        String result = HttpUtil.get(TOKEN_URL, params);
        JSONObject jsonObject = JSONUtil.parseObj(result);

        if(ObjectUtils.isNotEmpty(jsonObject.getInt("errcode"))){
            throw new RuntimeException(jsonObject.getStr("errmsg"));
        }

        return jsonObject.getStr("access_token");
    }
}
